public final void testSubtractionBetweenIntegersSimplification() {
    Minus minus = new Minus();
    minus.left = new Number(5);
    minus.left.type = IntegerType.instance;
    minus.right = new Number(2);
    minus.right.type = IntegerType.instance;

    expressionSimplificationTester(minus, Number.class, IntegerType.instance, 3, true);
  }